Older MemberWing 4.x use to create 4 hierarchical user levels: bronze, silver, gold and platinum. bronze - lowest level, platinum - highest.
Each level was represented by the premium marker such as:
{+} for bronze, {+++} for gold, etc...
You insert premium marker inside text to allow/deny access to proper levels.
The disadvantage of that approach was that level names were hardcoded and there could be no more and no less than 4 levels.

MemberWing-X 5.x (MWX) neither creates nor use any special user levels to manage access to different types of premium content.
Each new premium user with MemberWing-X is still a 'subscriber'.
MWX uses name of product that user owns to decide whether to allow or deny user access to content. MWX premium marker is a keyword that is matched against the product that member owns.
This premium marker: {{{gold}}} matches "Gold Membership" as well as "GOLD bullion" as well as "Goldfinger movie" product. MWX matches premium marker used in article with product name that member owns in case-insensitive substring manner. If match found - user will be allowed to access article/page.

For example if user 'joe' purchased "Gold Membership" and you have content protected with {{{gold}}} premium marker - then 'joe' will be allowed to access this content.
If another user 'mary' purchased "Platinum Membership" - she will not be allowed to access anything below {{{gold}}} marker. To let both 'mary' and 'joe' to access this article you need to use marker such as this:
{{{gold|platinum}}}
This structure allows you to create unilimited "membership levels" and name them any way you want. You may also set your subscription product names to anything you want.
For example if you have 2 subscriptions: "Fish Access" and "Dragon Access" and you want "fish" users to see only part of premium stuff and "dragon" users to see all the premium stuff - you will use markers such as these:
{{{fish|dragon}}} - Both fish and dragon can access stuff
{{{access}}} - Both fish and dragon can access stuff (keyword 'access' belongs to both products).
{{{dragon}}} - Only "dragon" product owners will be able to access this stuff.
{{{fish}}} - this will make "fish" users feel special - only them (but not "dragon" users) will be able to access this stuff.

MWX saves list of products that each member owns into special metadata area that each Wordpress user has.

You, as a webmaster may edit/add/remove products manually via admin panel by going to:
Wordpress admin->Users->username, scroll down to see the table "Products owned".
There you will see all the products that given member owns, you may change the status of each product (make it active or inactive) and even set expiration date for each product that member owns.

For much more details about "Premium markers" with samples please see MemberWing-X manual.
See "Migration" section of MWX manual for questions regarding moving from MemberWing 4.x to MemberWing-X 5.x

Gleb